Results 21 to 30 of about 3,077,132 (240)
Meikuang Anquan, 2021 Uniaxial compression was performed on frozen and untreated frozen coal samples under natural and natural saturated conditions. The strength and deformation characteristics of coal samples were analyzed, and the AE characteristics and damage evolution ...
FAN Guowei, SHANG Junning
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Research on Determination of Coal Pillar Bearing Law and Width Based on Coal Damage Evolution
Meikuang Anquan, 2020 In order to solve the on-site problems of unclear coal pillar bearing law and difficult determination of reasonable width, this paper uses numerical simulation and on-site industrial tests to analyze the wall rock deformation law, coal pillar bearing property evolution law, the law of internal crack propagation and support control of coal pillar.
GUO Jun, ZHANG Kexue, WANG Xiangyu, KANG Lei, WANG Xiaoling, ZHU Jun’ao
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Applied SciencesPre-grouting is an effective method to reinforce fractured coal in front of working faces. The mining of adjacent working faces after grouting can cause early damage to the grouting cemented coal. To explore the mechanical properties of grouting cemented
Aibing Jin +4 more
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Subsection amplification cyclic deterioration mechanism of creep damaged coal [PDF]
Meitan kexue jishuUnder the excavation effects of deep coal and rock, obvious creep damage is produced under the action of high stress for a long time and the sudden destabilization of the creep-damaged coal body induces rock burst disaster under the mining action in ...
Yangyang LI +5 more
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Study on periodic stress bearing characteristics of water-immersed coal body
Meikuang Anquan, 2023 For the long-term progressive damage of the coal pillar dam body of the underground reservoir under the action of water immersion-periodic stress, taking a mine in Shaanxi Province as the engineering background of the underground reservoir project, the ...
LIU Xiaofei, XUE Zongjian, NIU Tengchong
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Study on creep failure of coal specimen subjected to step loading
Meikuang Anquan, 2021 In order to further study the energy evolution and damage failure of coal specimen subjected to step creep loading, the Shimadzu AX-G250 test machine was used to carry out the creep test of coal specimen subjected to step loading. Test results show that
DUAN Huiqiang
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Applied Sciences, 2021 To study the damage and destruction behavior of small coal pillars in coal mine roadway driving along gobs under long-term in-situ stress and multiple engineering disturbances, an unconfined compression experiment under a discontinuous cyclic load was ...
Zhe Xiang +3 more
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Experimental study on damage characteristics and energy evolution of coal by ultrasonic power
Meitan kexue jishu, 2023 In order to study the mechanical damage characteristics and energy evolution law of coal after ultrasonic fracturing, uniaxial compression experiments were carried out on fractured coal with different power by using electronic universal pressure testing ...
LI Shugang +6 more
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Rock and Soil Mechanics, 2021 In order to explore the impact of moisture on the mechanical properties of coal, the triaxial compression tests of raw coal with different moisture contents are carried out by using the triaxial servo-controlled seepage equipment for thermal-hydro ...
LI Bo-bo +5 more
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Advances in Materials Science and Engineering, 2022 The coal mining process is often accompanied by periodic disturbance of the surrounding rock mass around the coal mining face. Therefore, it is of great theoretical and engineering value to investigate the damage pattern of bituminous coal under cyclic ...
Shuang Gong +7 more
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